Hi Gauurav, Did you receive any response from OpenStack? Thanks, Sumit Marwah Technology & Sales Director, APJ | Brocade Broadcom Mobile: +6596452240 1 Yishun Ave 7 | Singapore sumit.marwah@broadcom.com | broadcom.com On Wed, Nov 3, 2021 at 12:50 PM Gauurav Sabharwal1 < gauurav.sabharwal@in.ibm.com> wrote:

Hi Experts ,

I need some expert advise of one of the scenario, I have multiple isolated OpenStack cluster running with train & rocky edition. Each OpenStack cluster environment have it's own isolated infrastructure of SAN ( CISCO fabric ) & Storage ( HP, EMC & IBM).

Now company planning to refresh their SAN infrastructure. By procuring new Brocade SAN switches. But there are some migration relevant challenges we have.

1. As we understand under one cinder instance only one typer of FC zone manager is supported . Currently customer configured & managing CISCO .* Is it possible to configure two different vendor FC Zone manager under one cinder instance.* 2. Migration of SAN zoning is supposedly going to be happen offline way from OpenStack point of view. We will be migrating all ports of each existing cisco fabric to Brocade with zone configuration using brocade CLI. *Our main concern is that after migration How CINDER DB update new zone info & path via Brocade SAN.*

Regards Gauurav Sabharwal IBM India Pvt. Ltd. IBM towers Ground floor, Block -A , Plot number 26, Sector 62, Noida Gautam budhnagar UP-201307. Email:gauurav.sabharwal@in.ibm.com Mobile No.: +91-9910159277

-- This electronic communication and the information and any files transmitted with it, or attached to it, are confidential and are intended solely for the use of the individual or entity to whom it is addressed and may contain information that is confidential, legally privileged, protected by privacy laws, or otherwise restricted from disclosure to anyone else. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any use, copying, distributing, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you received this e-mail in error, please return the e-mail to the sender, delete it from your computer, and destroy any printed copy of it.

On 03/11, Gauurav Sabharwal1 wrote:

Hi Experts ,

I need some expert advise of one of the scenario, I have multiple isolated OpenStack cluster running with train & rocky edition. Each OpenStack cluster environment have it's own isolated infrastructure of SAN ( CISCO fabric ) & Storage ( HP, EMC & IBM).

Now company planning to refresh their SAN infrastructure. By procuring new Brocade SAN switches. But there are some migration relevant challenges we have.

As we understand under one cinder instance only one typer of FC zone manager is supported . Currently customer configured & managing CISCO . Is it possible to configure two different vendor FC Zone manager under one cinder instance.

Hi, No, it's not currently supported. As you mention, Cinder only supports a single zone manager for all the backends from a single cinder-volume parent process. But there are things that can be done, like running a second cinder-volume service with the new Zone Manager configuration.

Migration of SAN zoning is supposedly going to be happen offline way from OpenStack point of view. We will be migrating all ports of each existing cisco fabric to Brocade with zone configuration using brocade CLI. Our main concern is that after migration How CINDER DB update new zone info & path via Brocade SAN.

When you say that the update is going to happen offline, does it mean all instances will be shutdowwn and have the cinder volumes detached from the VMs? If cinder volumes are detached from instances then everything will be fine. If volumes are still attached (even if VM is shelved) then it's a different story, though it should still be doable with the right procedure. Though I definitely don't feel comfortable providing the procedure since I have never done it and would require appropriate on-site testing. Cheers, Gorka.

Regards Gauurav Sabharwal IBM India Pvt. Ltd. IBM towers Ground floor, Block -A , Plot number 26, Sector 62, Noida Gautam budhnagar UP-201307. Email:gauurav.sabharwal@in.ibm.com Mobile No.: +91-9910159277